A systematic construction via Atiyah-Hirzebruch spectral sequence yields topological invariants that completely characterize K-groups for TRS spinful superconductors in 159 space groups.
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A scale-free topological directional amplification is found in the Hatano-Nelson model with perturbed open boundaries, attributed to first-order boundary effects and characterized by a winding number on a continuous generalization of the finite-size Brillouin zone.
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Towards complete characterization of topological insulators and superconductors: A systematic construction of topological invariants based on Atiyah-Hirzebruch spectral sequence
A systematic construction via Atiyah-Hirzebruch spectral sequence yields topological invariants that completely characterize K-groups for TRS spinful superconductors in 159 space groups.
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Scale-Free Response with Directional Amplification in Critical Non-Hermitian Systems
A scale-free topological directional amplification is found in the Hatano-Nelson model with perturbed open boundaries, attributed to first-order boundary effects and characterized by a winding number on a continuous generalization of the finite-size Brillouin zone.